It is much simpler to buy books than to read them and easier to read them than to absorb their contents.

The philosophies of one age have become the absurdities of the next, and the foolishness of yesterday has become the wisdom of tomorrow.

Gentlemen, I have a confession to make. Half of what we have taught you is in error, and furthermore we cannot tell you which half it is

The teacher's life should have three periods, study until twenty-five, investigation until forty, profession until sixty, at which age I would have him retired on a double allowance.

The successful teacher is no longer on a height, pumping knowledge at high pressure into passive receptacles.

Think not of the amount to be accomplished, the difficulties to be overcome, or the end to be attained, but set earnestly at the little task at your elbow, letting that be sufficient for the day.

To have striven, to have made the effort, to have been true to certain ideals - this alone is worth the struggle.